FGCOM/libpri
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Change behavior so that we do not send I-frames when link is down, but instead queue them up until the link comes up and send them out then.

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git-svn-id: https://origsvn.digium.com/svn/libpri/branches/1.4@675 2fbb986a-6c06-0410-b554-c9c1f0a7f128
This commit is contained in:
Matthew Fredrickson 2009-01-22 21:48:41 +00:00
parent 07c4195876
commit a30eeee9a8
1 changed files with 27 additions and 17 deletions
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44
q921.c
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@ -268,12 +268,31 @@ static void reschedule_t203(struct pri *pri)
pri->t203_timer = pri_schedule_event(pri, pri->timers[PRI_TIMER_T203], t203_expire, pri);
}
static void q921_send_queued_iframes(struct pri *pri)
{
struct q921_frame *f;
f = pri->txqueue;
while(f && (pri->windowlen < pri->window)) {
if (!f->transmitted) {
/* Send it now... */
if (pri->debug & PRI_DEBUG_Q921_DUMP)
pri_message(pri, "-- Finally transmitting %d, since window opened up (%d)\n", f->h.n_s, pri->windowlen);
f->transmitted++;
pri->windowlen++;
f->h.n_r = pri->v_r;
f->h.p_f = 0;
q921_transmit(pri, (q921_h *)(&f->h), f->len);
}
f = f->next;
}
}
static pri_event *q921_ack_rx(struct pri *pri, int ack, int send_untransmitted_frames)
{
int x;
int cnt=0;
pri_event *ev;
struct q921_frame *f;
/* Make sure the ACK was within our window */
for (x=pri->v_a; (x != pri->v_s) && (x != ack); Q921_INC(x));
if (x != ack) {
@ -309,20 +328,7 @@ static pri_event *q921_ack_rx(struct pri *pri, int ack, int send_untransmitted_f
if (!pri->busy && send_untransmitted_frames) {
pri->retrans = 0;
/* Search for something to send */
f = pri->txqueue;
while(f && (pri->windowlen < pri->window)) {
if (!f->transmitted) {
/* Send it now... */
if (pri->debug & PRI_DEBUG_Q921_DUMP)
pri_message(pri, "-- Finally transmitting %d, since window opened up (%d)\n", f->h.n_s, pri->windowlen);
f->transmitted++;
pri->windowlen++;
f->h.n_r = pri->v_r;
f->h.p_f = 0;
q921_transmit(pri, (q921_h *)(&f->h), f->len);
}
f = f->next;
}
q921_send_queued_iframes(pri);
}
if (pri->debug & PRI_DEBUG_Q921_DUMP)
pri_message(pri, "-- Waiting for acknowledge, restarting T200 counter\n");
@ -515,7 +521,7 @@ int q921_transmit_iframe(struct pri *pri, void *buf, int len, int cr)
pri->txqueue = f;
/* Immediately transmit unless we're in a recovery state, or the window
size is too big */
if (!pri->retrans && !pri->busy) {
if ((pri->q921_state != Q921_LINK_CONNECTION_ESTABLISHED) || (!pri->retrans && !pri->busy)) {
if (pri->windowlen < pri->window) {
pri->windowlen++;
q921_transmit(pri, (q921_h *)(&f->h), f->len);
@ -534,7 +540,9 @@ int q921_transmit_iframe(struct pri *pri, void *buf, int len, int cr)
}
if (pri->debug & PRI_DEBUG_Q921_DUMP)
pri_message(pri, "Starting T_200 timer\n");
reschedule_t200(pri);
/* Check this so that we don't try to send frames while multi frame mode is down */
if (pri->q921_state == Q921_LINK_CONNECTION_ESTABLISHED)
reschedule_t200(pri);
} else {
pri_error(pri, "!! Out of memory for Q.921 transmit\n");
return -1;
@ -799,6 +807,8 @@ static pri_event *q921_dchannel_up(struct pri *pri)
/* Notify Layer 3 */
q931_dl_indication(pri, PRI_EVENT_DCHAN_UP);
q921_send_queued_iframes(pri);
/* Report event that D-Channel is now up */
pri->ev.gen.e = PRI_EVENT_DCHAN_UP;
return &pri->ev;